IDT82P2288 Integrated Device Technology, Inc., IDT82P2288 Datasheet - Page 88

• Manufacturer Part Number: IDT82P2288
• Description: 8 Channel T1/J1/E1 Transceiver
• Manufacturer: Integrated Device Technology, Inc.

IDT82P2288
3.20.3
J1 ONLY)
transmitted in the ESF format in T1/J1 mode.
Error event detected in the B8ZS/HDL3/AMI Decoder;
No. 1 to Octet No. 14. In the above table, the value in the C/R bit posi-
tion, the R bit position, the U1 bit position, the U2 bit position and the LB
bit position are determined by the CRBIT bit, the RBIT bit, the U1BIT bit,
the U2BIT bit and the LBBIT bit in the APRM Control register respec-
tively.
Table 54: APRM Interpretation
Table 53: APRM Message Format
A Logic 1 In The Following Bit Position
The Automatic Performance Report Message (APRM) can only be
Five kinds of events are counted every second in the APRM:
1. The Bipolar Violation (BPV) Error / HDB3 Code Violation (CV)
2. The CRC-6 Error event detected in the Frame Processor;
The APRM is transmitted bit by bit from Bit 1 to Bit 8 and from Octet
Octet No.
10
11
12
13
14
1
2
3
4
5
6
7
8
9
AUTOMATIC PERFORMANCE REPORT MESSAGE (T1/
G1
G2
G3
G4
G5
G6
SE
FE
LV
SL
Bit 8
G3
FE
G3
FE
G3
FE
G3
FE
Bit 7
SE
SE
SE
SE
LV
LV
LV
LV
Bit 6
G4
LB
G4
LB
G4
LB
G4
LB
Bipolar Violation (BPV) Error / HDB3 Code Violation (CV) Error event ≥ 1
77
Bit 5
Severely Frame Alignment Bit Error event ≥ 1
SAPI (‘001110C/R0’)
G1
Control (‘00000011’)
U1
G1
U1
G1
U1
G1
U1
cessor;
Frame Processor;
Message is generated every one second and transmitted on the DL bit
positions. The APRM format is illustrated in Table 53.
numbers counted by the APRM. The details are listed in Table 54. Their
default value are ‘0’s.
Flag (‘01111110’)
TEI (‘00000001’)
OCTAL T1/E1/J1 LONG HAUL / SHORT HAUL TRANSCEIVER
Frame Alignment Bit Error event ≥ 1
100 < CRC-6 Error event ≤ 319
3. The Frame Alignment Bit Error event detected in the Frame Pro-
4. The Severely Frame Alignment Bit Error event detected in the
5. The Buffer Slip event occurred in the Elastic Store Buffer.
Enabled by the AUTOPRM bit, the Automatic Performance Report
The Nm and Ni bit position is a module 4 counter.
The remaining bits in Octet No.5 to Octet No. 12 interpret the event
10 < CRC-6 Error event ≤ 100
FCS
5 < CRC-6 Error event ≤ 10
1 < CRC-6 Error event ≤ 5
CRC-6 Error event > 320
CRC-6 Error event = 1
Buffer Slip event ≥ 1
Interpretation
Bit 4
U2
U2
U2
U2
R
R
R
R
Bit 3
G5
G2
G5
G2
G5
G2
G5
G2
Bit 2
Nm
Nm
Nm
Nm
SL
SL
SL
SL
March 22, 2004
Bit 1
G6
G6
G6
G6
Ni
Ni
Ni
Ni